Indium(III) compounds containing the neopentyl substituent, In(CH2CMe3)3, In(CH2CMe3)2Cl, In(CH2CMe3)Cl2, and In(CH2CMe3)2CH3. Crystal and molecular structure of dichloroneopentylindium(III), an inorganic polymer

Article abstract of DOI:10.1021/om00110a014

The neopentylindium(III) derivatives In(CH₂CMe₃)₃, In(CH₂CMe₃)₂Cl, In(CH₂CMe₃)Cl₂, and In(CH₂CMe₃)₂Me have been prepared and characterized by elemental analyses, cryoscopic molecular weight studies in benzene, IR and ¹H NMR spectroscopic data, and Lewis acidity studies. Molecular weight studies suggest that In(CH₂CMe₃)₃ and In(CH₂CMe₃)₂Me are monomeric molecules whereas In(CH₂CMe₃)₂Cl is dimeric in benzene solution. The dichloro derivative In(CH₂CMe₃)Cl₂, which has insufficient solubility in benzene for molecular weight studies, crystallizes in the acentric space group P2₁2₁2₁ with a = 6.717 (4) ?, b = 12.217 (4) ?, c = 22.658 (7) ?, V = 1859 ?³, and Z = 8 (formula units). Diffraction data (Mo Kα, 2θ = 2-50°) were collected with a Enraf-Nonius CAD-4/θ-2θ diffractometer. Full-matrix least-squares refinement led to a final R value of 9.062 for 1584 observed [F_o ≥ 5σ(F_o)] reflections. Dichloroneopentylindium(III) is a one-dimensional polymer with no short contacts between strands. Each indium has distorted trigonal-bipyramidal geometry.